B2M gene

beta-2-microglobulin

The information on this page was automatically extracted from online scientific databases.

From NCBI Gene:

This gene encodes a serum protein found in association with the major histocompatibility complex (MHC) class I heavy chain on the surface of nearly all nucleated cells. The protein has a predominantly beta-pleated sheet structure that can form amyloid fibrils in some pathological conditions. The encoded antimicrobial protein displays antibacterial activity in amniotic fluid. A mutation in this gene has been shown to result in hypercatabolic hypoproteinemia.[provided by RefSeq, Aug 2014]

From UniProt:

Component of the class I major histocompatibility complex (MHC). Involved in the presentation of peptide antigens to the immune system. Exogenously applied M.tuberculosis EsxA or EsxA-EsxB (or EsxA expressed in host) binds B2M and decreases its export to the cell surface (total protein levels do not change), probably leading to defects in class I antigen presentation (PubMed:25356553).

From NCBI Gene:

  • Familial visceral amyloidosis, Ostertag type
  • Hypoproteinemia, hypercatabolic

From UniProt:

Immunodeficiency 43 (IMD43): A disorder characterized by marked reduction in serum concentrations of immunoglobulins and albumin, and hypoproteinemia due to hypercatabolism. Patients may suffer from recurrent respiratory tract infections and severe skin disease. [MIM:241600]

Amyloidosis 8 (AMYL8): A form of hereditary generalized amyloidosis. Clinical features include extensive visceral amyloid deposits, renal amyloidosis resulting in nephrotic syndrome, arterial hypertension, hepatosplenomegaly, cholestasis, petechial skin rash. There is no involvement of the nervous system. [MIM:105200]

Cytogenetic Location: 15q21.1, which is the long (q) arm of chromosome 15 at position 21.1

Molecular Location: base pairs 44,711,487 to 44,718,159 on chromosome 15 (Homo sapiens Annotation Release 108, GRCh38.p7) (NCBI)

Cytogenetic Location: 15q21.1, which is the long (q) arm of chromosome 15 at position 21.1